There you have it. Additionally, I will be wearing my second pair of adventure pants and a third T shirt, as well as a fifth pair of socks. The bag weighs less than 30 pounds with water-weight, so it shouldn't be too hard on me.

Things you may notice as missing: propane stove and alcohol.
I'd rather carry bread and PB&J than two tanks of fuel (one as a backup) and a stove-thing - no open fires are allowed in the canyon.
Also, the Havasupai tribe prohibits alcohol in the canyon.